This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.

Firefox says, "A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

  • 1 èsì
  • 2 ní àwọn ìṣòro yìí
  • 11 views
  • Èsì tí ó kẹ́hìn lọ́wọ́ cor-el

more options

I have a mac running OSX 10.6.8 and I'm having issues with firefox not responding so then I close it. Then when i try to open firefox it says "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I look in the activity monitor and it does not show that firefox is running. The only solution i have found is to completely restart my mac, which is not convenient to do often. I have searched elsewhere online for a solution, but i could not find one. Any help would be appreciated. Thanks

I have a mac running OSX 10.6.8 and I'm having issues with firefox not responding so then I close it. Then when i try to open firefox it says "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I look in the activity monitor and it does not show that firefox is running. The only solution i have found is to completely restart my mac, which is not convenient to do often. I have searched elsewhere online for a solution, but i could not find one. Any help would be appreciated. Thanks

All Replies (1)

more options